Finally add splash to the kernel's command line (e.g. by adding it to
/etc/default/grub).

Afterwards reboot and you should see the solar flares:

We're still not fully there yet since we need a newer gdm for a flicker free
handover. Fortunately the Debian GNOME maintainers have already prepared a
new package in svn. We also need proper support for encrypted disks, asking
for the passphrase works with this fix but cryptsetup needs support for
it.

In case somebody wants to run KDE together with some GTK+ based
applications (like Iceweasel or Icedove) having a consistent style as
well as look and feel between KDE and GTK+ applications is a nice thing to
have. QtCurve together with xsettings-kde and gtk-qt-engine makes
this easily possible: